2 * Store Windows ACLs in a tdb.
4 * Copyright (C) Volker Lendecke, 2008
5 * Copyright (C) Jeremy Allison, 2008
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "smbd/smbd.h"
23 #include "system/filesys.h"
24 #include "librpc/gen_ndr/xattr.h"
25 #include "librpc/gen_ndr/ndr_xattr.h"
26 #include "../lib/crypto/sha256.h"
27 #include "dbwrap/dbwrap.h"
28 #include "dbwrap/dbwrap_open.h"
33 #define DBGC_CLASS DBGC_VFS
35 #define ACL_MODULE_NAME "acl_tdb"
36 #include "modules/vfs_acl_common.c"
38 static unsigned int ref_count;
39 static struct db_context *acl_db;
41 /*******************************************************************
42 Open acl_db if not already open, increment ref count.
43 *******************************************************************/
45 static bool acl_tdb_init(void)
54 dbname = state_path("file_ntacls.tdb");
62 acl_db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
63 DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
81 /*******************************************************************
82 Lower ref count and close acl_db if zero.
83 *******************************************************************/
85 static void disconnect_acl_tdb(struct vfs_handle_struct *handle)
87 SMB_VFS_NEXT_DISCONNECT(handle);
94 /*******************************************************************
95 Fetch_lock the tdb acl record for a file
96 *******************************************************************/
98 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
99 struct db_context *db,
100 const struct file_id *id)
104 /* For backwards compatibility only store the dev/inode. */
105 push_file_id_16((char *)id_buf, id);
106 return dbwrap_fetch_locked(db,
108 make_tdb_data(id_buf,
112 /*******************************************************************
113 Delete the tdb acl record for a file
114 *******************************************************************/
116 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
117 struct db_context *db,
118 SMB_STRUCT_STAT *psbuf)
121 struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
122 struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
125 * If rec == NULL there's not much we can do about it
129 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
134 status = dbwrap_record_delete(rec);
139 /*******************************************************************
140 Pull a security descriptor into a DATA_BLOB from a tdb store.
141 *******************************************************************/
143 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
144 vfs_handle_struct *handle,
146 const struct smb_filename *smb_fname,
152 struct db_context *db = acl_db;
153 NTSTATUS status = NT_STATUS_OK;
154 SMB_STRUCT_STAT sbuf;
159 status = vfs_stat_fsp(fsp);
160 sbuf = fsp->fsp_name->st;
162 int ret = vfs_stat_smb_basename(handle->conn,
166 status = map_nt_error_from_unix(errno);
170 if (!NT_STATUS_IS_OK(status)) {
174 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
176 /* For backwards compatibility only store the dev/inode. */
177 push_file_id_16((char *)id_buf, &id);
179 status = dbwrap_fetch(db,
181 make_tdb_data(id_buf, sizeof(id_buf)),
183 if (!NT_STATUS_IS_OK(status)) {
184 return NT_STATUS_INTERNAL_DB_CORRUPTION;
187 pblob->data = data.dptr;
188 pblob->length = data.dsize;
190 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
191 (unsigned int)data.dsize, smb_fname->base_name ));
193 if (pblob->length == 0 || pblob->data == NULL) {
194 return NT_STATUS_NOT_FOUND;
199 /*******************************************************************
200 Store a DATA_BLOB into a tdb record given an fsp pointer.
201 *******************************************************************/
203 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
210 struct db_context *db = acl_db;
211 struct db_record *rec;
214 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
215 (unsigned int)pblob->length, fsp_str_dbg(fsp)));
217 status = vfs_stat_fsp(fsp);
218 if (!NT_STATUS_IS_OK(status)) {
222 id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
224 /* For backwards compatibility only store the dev/inode. */
225 push_file_id_16((char *)id_buf, &id);
226 rec = dbwrap_fetch_locked(db, talloc_tos(),
227 make_tdb_data(id_buf,
230 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
231 return NT_STATUS_INTERNAL_DB_CORRUPTION;
233 data.dptr = pblob->data;
234 data.dsize = pblob->length;
235 return dbwrap_record_store(rec, data, 0);
238 /*********************************************************************
239 On unlink we need to delete the tdb record (if using tdb).
240 *********************************************************************/
242 static int unlink_acl_tdb(vfs_handle_struct *handle,
243 const struct smb_filename *smb_fname)
245 struct smb_filename *smb_fname_tmp = NULL;
246 struct db_context *db = acl_db;
249 smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
250 if (smb_fname_tmp == NULL) {
255 if (smb_fname_tmp->flags & SMB_FILENAME_POSIX_PATH) {
256 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
258 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
265 ret = unlink_acl_common(handle, smb_fname_tmp);
271 acl_tdb_delete(handle, db, &smb_fname_tmp->st);
276 /*********************************************************************
277 On rmdir we need to delete the tdb record (if using tdb).
278 *********************************************************************/
280 static int rmdir_acl_tdb(vfs_handle_struct *handle,
281 const struct smb_filename *smb_fname)
284 SMB_STRUCT_STAT sbuf;
285 struct db_context *db = acl_db;
288 ret = vfs_stat_smb_basename(handle->conn, smb_fname, &sbuf);
293 ret = rmdir_acl_common(handle, smb_fname);
298 acl_tdb_delete(handle, db, &sbuf);
302 /*******************************************************************
303 Handle opening the storage tdb if so configured.
304 *******************************************************************/
306 static int connect_acl_tdb(struct vfs_handle_struct *handle,
310 int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
312 struct acl_common_config *config = NULL;
318 if (!acl_tdb_init()) {
319 SMB_VFS_NEXT_DISCONNECT(handle);
323 ok = init_acl_common_config(handle);
325 DBG_ERR("init_acl_common_config failed\n");
329 /* Ensure we have the parameters correct if we're
330 * using this module. */
331 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
332 "'dos filemode = true' and "
333 "'force unknown acl user = true' for service %s\n",
336 lp_do_parameter(SNUM(handle->conn), "inherit acls", "true");
337 lp_do_parameter(SNUM(handle->conn), "dos filemode", "true");
338 lp_do_parameter(SNUM(handle->conn), "force unknown acl user", "true");
340 SMB_VFS_HANDLE_GET_DATA(handle, config,
341 struct acl_common_config,
344 if (config->ignore_system_acls) {
345 mode_t create_mask = lp_create_mask(SNUM(handle->conn));
346 char *create_mask_str = NULL;
348 if ((create_mask & 0666) != 0666) {
350 create_mask_str = talloc_asprintf(handle, "0%o",
352 if (create_mask_str == NULL) {
353 DBG_ERR("talloc_asprintf failed\n");
357 DBG_NOTICE("setting 'create mask = %s'\n", create_mask_str);
359 lp_do_parameter (SNUM(handle->conn),
360 "create mask", create_mask_str);
362 TALLOC_FREE(create_mask_str);
365 DBG_NOTICE("setting 'directory mask = 0777', "
366 "'store dos attributes = yes' and all "
367 "'map ...' options to 'no'\n");
369 lp_do_parameter(SNUM(handle->conn), "directory mask", "0777");
370 lp_do_parameter(SNUM(handle->conn), "map archive", "no");
371 lp_do_parameter(SNUM(handle->conn), "map hidden", "no");
372 lp_do_parameter(SNUM(handle->conn), "map readonly", "no");
373 lp_do_parameter(SNUM(handle->conn), "map system", "no");
374 lp_do_parameter(SNUM(handle->conn), "store dos attributes",
381 /*********************************************************************
382 Remove a Windows ACL - we're setting the underlying POSIX ACL.
383 *********************************************************************/
385 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
390 struct db_context *db = acl_db;
392 struct smb_filename smb_fname = {
393 .base_name = discard_const_p(char, path)
396 ret = SMB_VFS_STAT(handle->conn, &smb_fname);
401 ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
409 acl_tdb_delete(handle, db, &smb_fname.st);
413 /*********************************************************************
414 Remove a Windows ACL - we're setting the underlying POSIX ACL.
415 *********************************************************************/
417 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
421 struct db_context *db = acl_db;
425 status = vfs_stat_fsp(fsp);
426 if (!NT_STATUS_IS_OK(status)) {
430 ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
437 acl_tdb_delete(handle, db, &fsp->fsp_name->st);
441 static struct vfs_fn_pointers vfs_acl_tdb_fns = {
442 .connect_fn = connect_acl_tdb,
443 .disconnect_fn = disconnect_acl_tdb,
444 .rmdir_fn = rmdir_acl_tdb,
445 .unlink_fn = unlink_acl_tdb,
446 .chmod_fn = chmod_acl_module_common,
447 .fchmod_fn = fchmod_acl_module_common,
448 .fget_nt_acl_fn = fget_nt_acl_common,
449 .get_nt_acl_fn = get_nt_acl_common,
450 .fset_nt_acl_fn = fset_nt_acl_common,
451 .chmod_acl_fn = chmod_acl_acl_module_common,
452 .fchmod_acl_fn = fchmod_acl_acl_module_common,
453 .sys_acl_set_file_fn = sys_acl_set_file_tdb,
454 .sys_acl_set_fd_fn = sys_acl_set_fd_tdb
458 NTSTATUS vfs_acl_tdb_init(void)
460 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb",